Stackable material handling box



FIG. 1 is a front perspective view of a stackable material handling box showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front perspective view showing a modified form of my new design; and

FIG. 4 is a rear perspective view thereof. 

The ornamental design for a stackable material handling box, as shown and described. 